EnWater Design
EnWater Design

Systems planning,
design & support for
water
wastewater &
reuse systems

We help utilities, industries and project teams translate treatment needs, reuse targets and site constraints into clearer pathways, stronger design decisions and more confident vendor engagement.

Urban water and reuse systems context

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Explore the main areas of support, then continue through the relevant advisory, project, design or sector pathway.

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Where our work is applied

Operating contexts where water, wastewater, reuse and residuals requirements need to be coordinated.

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Municipal and shared infrastructure

Municipal and shared infrastructure

Sewage treatment, district reuse, changing loads, network constraints and required duties such as landscaping or cooling.

Industrial production and effluent

Industrial production and effluent

Variable production streams, pretreatment, recovery, discharge limits, concentrate management and residuals requirements.

Commercial and institutional facilities

Commercial and institutional facilities

Greywater, laundry, kitchen, cooling and landscaping demands where segregation, storage, treatment and return-water quality must be coordinated.

Biosolids, residuals and odor

Biosolids, residuals and odor

Solids reduction, stabilisation, water removal, storage, outlet planning, sidestreams, odor and septicity requirements.

Planning insights

Practical notes for owners and operators, with further detail in the related advisory and project sections.

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Source control

Source control that
protects treatment

Short high-strength discharges and poorly separated streams can destabilise treatment even when average influent data appears manageable.

Source load and plant response
Peak loadingShort or batch discharges can determine aeration demand, chemical use and biological stability even when the average load appears acceptable.
Capacity recoveredSegregation, equalisation or targeted source treatment can recover usable capacity in the existing plant.
Planning consequenceConfirm whether the constraint is created upstream before adding more treatment downstream.
ZLD thermal closure

ZLD: linking concentration, thermal treatment and final solids handling

RO recovery alone does not establish ZLD. Where concentrate has no acceptable outlet, concentration, thermal duty and final solids handling must be resolved together.

ZLD route basis
Membrane limitIncreasing RO recovery reduces the volume sent to thermal treatment but raises brine concentration and scaling risk.
Thermal dutyThe remaining brine volume, its chemistry and the availability of usable heat determine the thermal load.
Final outletRecovered water is only one output; salts or sludge still need a workable handling or disposal route.
Biosolids market-ready outputs

Biosolids → treatment, product development and market readiness

The viable outlet is often limited by the properties that remain after treatment, including stability, pathogens, contaminants, moisture consistency and handling behaviour.

Biosolids outlet basis
Outlet-limiting propertiesStability, pathogens, contaminants, nutrient value, moisture consistency and handling behaviour determine which outlets remain available.
Route consequenceComposting, drying, fertilizer or thermal routes should be compared against the material quality required by the intended outlet.
Commercial realityStorage, seasonal demand, transport distance and consistent quality can decide whether a technically acceptable product has a practical outlet.

Representative project conditions

Examples showing how treatment, reuse and residuals requirements are assessed together before equipment is selected.

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Reuse-led STP upgrade with MBBR and UF

A reuse-led STP upgrade where biological capacity, final polishing and the receiving duty are assessed as one system.

Relevant where a plant is moving beyond discharge and needs a clearer basis for treated-water quality, residuals and supplier comparison.

Reuse upgrade
Why MBBR and UFMBBR can add biological capacity within a constrained footprint, while UF provides a consistent solids and turbidity barrier.
What UF does not resolveUF can provide low turbidity and a strong solids barrier after sewage treatment, but final reuse suitability still depends on disinfection, storage and the water-quality requirements of the intended duty.
Before supplier comparisonSet the actual flow and load basis, performance criteria, reject handling, testing and commissioning requirements.

Industrial recovery with batch treatment and RO

An industrial recovery route where batch treatment stabilises variable effluent before RO, while achievable recovery and concentrate handling are assessed from the start.

Relevant where metals, COD, scaling risk and disposal limits determine what can be recovered reliably.

Industrial recovery
Why batch treatment comes firstBatch treatment can remove variable metals, suspended solids and other contaminants before the water reaches RO.
What sets recoverySustainable RO recovery is governed by the remaining chemistry, scaling and fouling risk, not by the target percentage alone.
Concentrate routeDischarge, external disposal, further concentration or thermal treatment are compared according to the available outlet.

Biosolids route to compost

A biosolids-to-compost route where sludge quality, dewatering, feed preparation, composting, odor control and outlet requirements are assessed together.

Relevant where the objective is a stable, manageable product with a realistic outlet, not only reduced sludge volume.

Biosolids outlet
Class A process basisWhere Class A pathogen-reduction status is required, the composting method, time-temperature exposure, turning or aeration regime, monitoring and records must form part of the operating basis.
Composting basisMoisture, aeration, temperature, processing time and available space determine whether windrow or aerated static pile is workable.
Outlet basisProduct testing, storage, handling and actual demand determine whether the compost route remains viable.

Start with the issue or decision in front of you

Share what is already established, the current constraint and the next decision or output required. We will identify the first assignment needed.